| OCR Text |
Show 290 triangular patches (Fig. 209). of evidence lesser a subspecies, . 1. to appear of californica. intergradation In these suffusion of red a with around the third a they specimens limbata is there specimens some intergrades between . 1. but with venusta color be amount In and H. dark 1. abdominal markings. Spieth (194Ib) its and species of H. nymphs provides descriptions and subspecies, a of adults of this general description of the limbata. Biology Hnt (1951, 1953) in species extensively is discussion lakes and slow with nymphs of lected from June The of imagos not are in the will acter album following key typical adequately the works. and rivers this following nymphs canals at occur in lower association in Adults of history the The often found (Say). serves the of forms known intergrades, between are life and have been col through September. present study. be They Ephoron Michigan to his silted flowing, the studied southern supplemental in Idaho. elevations has to Most thus to distinguish three present the male subspecies. a key to the The nymphs subspecies specimens from southern Idaho more or less typical subspecies. intermediate in char |
